ES2523794T3 - Provision of sliding bearings, their use, and reservoir or pressure vessel provided therewith and their use - Google Patents

Abstract

Pairing of cutting or contact surfaces of at least two individual components or construction elements, in which at least one of the components or elements is made of titanium, aluminum or alloys thereof with each other or with other metals and another component or element in contact with it or connected to or connected to it is made of a material or is provided with a material such that it has a hardness less than titanium, aluminum or alloys thereof with each other or with other metals.

Description

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DESCRIPTION

Provision of sliding bearings, their use, and reservoir or pressure vessel provided therewith and their use

The invention essentially relates to the configuration of the cutting or contact surfaces of constructive elements of a sliding bearing arrangement, of which at least one of the elements is made of titanium, aluminum or alloys thereof with respect to each other or With other metals. A sliding bearing arrangement designed in a manner is according to the invention component of a container according to claim 1.

In DE 10 2004 060 591 A1 a container is described, the container being designed for shock absorption and to avoid distortions in welding with a special suspension arrangement.

Titanium and its alloys with aluminum or other metals form a group of frequently used materials in the field of air and space navigation, and also in mechanical engineering. The reason for this is the low density compared to other groups of materials and, therefore, a low weight with high strength at the same time. As for the manufacturing technique, titanium and most titanium alloys are suitable for most of the usual processes, such as chip removal, as well as forming and assembly techniques of all kinds that are applied in the navigation sector air or space On the other hand, other properties of the raw or finished construction piece of titanium and titanium alloys are considered rather inadequate. In this way, due to its bad sliding properties, there is only a limited selection of complementary sliding parts, fixed pairing with other materials, such as stainless steel, there is a danger of contact corrosion or seizure. There may also be a problem of low resistance to pressure or surface hardness.

In global constructions comprising individual construction pieces of titanium or its alloys, these negative impact properties must be considered and avoided by the type of construction. Currently, the cut-off or contact points between titanium or titanium alloys and other materials are adapted by construction, for example, by selecting certain materials or by increasing contact surfaces to avoid pressure points. In special cases the treatment and handling of the individual construction parts during assembly and / or transport must be prescribed under narrow limits by means of operating instructions. This requires in part a detailed training and instruction of staff and users.

The slide bearing arrangement that is used according to the invention comprises a bearing element and an axle or shaft, the shaft or shaft being made in particular of titanium, aluminum or alloys thereof with each other and / or with other metals.

The bearing element is constructed such that cold welding with the shaft or shaft is prevented under conditions as they appear in particular in air or space navigation. The sliding bearing arrangement forms a free bearing, as is generally used for suspension for example of pressure vessels and vessels or for installations in the process technique.

In the field of air or space navigation, it is currently customary to suspend high-pressure tanks or reservoirs for the reception, storage and delivery of gaseous, liquid and solid media with a shell and tank stumps or tubing installed integrally in the envelope of polar way, that is to say in the stumps or tubing of deposit, which are preferably arranged in the poles on the longitudinal axis of such a deposit. Such a suspension is shown in Figure 1.

The suspension for a reservoir 11 or container on / in a support structure 12 comprises or so-called fixed bearing 13 and a so-called free bearing 14. The fixed bearing 13 is often configured as a spherical joint bearing or as a rigid flange which is fixedly bolted to the support structure 12. The free bearing 14 must fulfill two functions. The free bearing 14 will compensate on the one hand for differences in the longitudinal expansion according to the arrow A between tank 11 and support structure 12 that may appear due to temperature differences in the operation of the tank 11 or in the case of different internal pressures that and temperatures that have appeared. The free bearing 14 on the other hand can compensate for vibratory movements, that is to say forces acting laterally according to arrow T, such as those that appear when a rocket is launched. For this, a two-piece bearing is used which is made of an outer bearing or outer ring and an inner bearing ring or inner ring, only the outer bearing ring being firmly attached to the support structure 12. The ring Inner bearing is housed in the outer bearing ring pivotally for the housing of the reservoir 11.

The usual materials for bearings are different steels or ceramic materials. The tanks, which are used in the field of air or space navigation, are mainly made of titanium, aluminum or alloys thereof with each other and / or with other metals to meet the demands of strength and lightness in the same way. This can result in a sliding bearing pairing that is made of titanium,

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aluminum or alloys thereof with each other and / or with other metals (shaft or reservoir tubing) and steel (inner bearing ring).

It is true and it is known that titanium, aluminum or alloys thereof with each other and / or with other metals have resistance properties for poor dry running, i.e. lousy sliding properties (see also above) without additional lubrication. A sliding bearing pairing from these materials and steel therefore leads to a cold welding, so that both components, bearing and shaft or shaft or reservoir tubing are stuck or seized. However, an error in this sliding contact pairing for the function of in particular satellite deposits also of other technical procedure facilities is more than problematic and it was necessary to modify some aspect either by the deposit or the installation or by bearing part

For example, to avoid cold welding between a titanium or titanium alloy reservoir tubing and a steel bearing, it was proposed to fit a "self-lubricating" steel sleeve into the titanium reservoir tubing. Steel on steel glides almost without any problem as is known. However, this measure requires an additional construction stage that is not insignificant in the manufacturing of the tanks. In addition, an ion or particle formation can also occur in this combination.

From the ESA study (ESA STM-279 November 2009; Assessment of Cold Welding between Separable Contact Surfaces due to Impact and Fretting under Vacuum; A. Merstallinger, M. Sales, E. Semerad (Austrian Institute of Technology) and B. Dunn ( ESA / ESTEC)) to avoid cold welding you can deflect coatings on the inner side of the bearing components. Currently, in the most innovative satellite deposit projects, sliding bearing pairings are conceived based on this study and according to experimental values. For example, the internal bearing sides are coated with polytetrafluoroethylene (PTFE), that is Teflon to suppress a cold weld. Unfortunately, the requirements tests that must be met for the air or space navigation sector have shown that Teflon does not meet these requirements, rather the material wears out or breaks prematurely and there is a failure of the sliding bearing pairing.

For sectors of application in air or space navigation as in the case of deposits for satellites and similar devices, but also in general for installations in the procedure technique, there is therefore therefore a need to indicate a bearing material designed properly for pairing sliding bearing with titanium, aluminum or alloys thereof with each other and / or with other metals.

When carrying out the tests of usual requirements in air or space navigation it was now detected that the part of a pairing always fails first, in this case the PTF coating and then the titanium or titanium alloy , from which the reservoir is manufactured and therefore the reservoir tubing. From this it was concluded that at least for the pairing with titanium a bearing material must be found that prevents cold welding also under the conditions that appear in air or space navigation. It should have a hardness less than titanium or its alloy as it is used to make the tanks.

The object of the present invention is a container with the features of claim 1. The invention therefore takes advantage of the knowledge that contact corrosion can be avoided when combining elements of titanium, aluminum or alloys thereof with each other or with others. Metals and other element in contact with them, attached or that will be attached to them of a material is equipped with such material that has a hardness less than titanium or titanium alloy.

A pairing of cutting and contact surfaces is described as screw connection or tightening joint in Figures 4.

Such a material in its pairing with titanium, or alloys thereof with each other and / or with other metals must comply with the special requirements tests, specifically over 11,000 test cycles a 1 kN side load as well as an amplitude of oscillations of +/- 7 mm at a frequency of 40 Hz, without cold welding.

The intermediate element or the intermediate layer is therefore made of a material, which has a lower hardness than the aforementioned shaft or shaft materials. Therefore, precipitated wear of this material and therefore a premature failure of the sliding bearing arrangement can be avoided.

According to the invention, the intermediate element or the intermediate layer is configured completely or at least partially of a mixture of Teflon and fibers embedded in sintered bronze. As fiber material, for example, glass fibers or ceramic fibers can be mentioned. Sintered bronze means within the framework of the present invention mainly tin bronzes whose porosity allows the inclusion of the mixture of PTFE and fibers. The mixture of PTFE and fibers prevents an exit of ions from sintered bronze. The layer of sintered bronze, PTFE and glass fibers or ceramic fibers should preferably end on the inner side with a

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thin PTFE or ceramic film to better prevent possible ion transport

Preferably the intermediate element is configured in this context as a bushing or sleeve. While bushings of this type can be obtained basically on the market (for example CSB-50 Steel Bronze Powder with PTFE / Fiber Dry Bearing). However, its application in combination with titanium bearing or reservoir tubing is not known, with respect to the aforementioned materials, that is, in the arrangement of sliding bearings with these materials or alloys. Precisely this arrangement of sliding bearings, in particular titanium alloy and the sintered bronze indicated, led to totally unexpected results in the requirements tests in the requirements tests. The requirements as imposed for applications in air or space navigation were not only met but were far exceeded. In this way the sliding bearing arrangement resists 1.5 kN through 200,000 test cycles.

As an alternative to this, it is also within the framework of the invention to place the intermediate element as a layer on or on a surface of the bearing element or of the sleeve or sleeve, which is directed to the shaft or shaft.

It is also conceivably preferred to also configure the intermediate element as part of the bearing element and for example use the inner bearing ring as an intermediate element that is completely made of the aforementioned bronze material.

For certain applications an intermediate element or a coating only of the mentioned sintered bronze is also possible. Since in this case, however, a displacement of ions and particles may appear can prevent deterioration of the electronic components by appropriate additional measures.

In a preferred embodiment of the present invention, the bearing element is configured in two pieces and comprises an outer bearing ring and an inner bearing ring, such that the shaft or shaft is axially movably mounted. The invention can therefore be implemented with all configurations of commonly available sliding bearing arrangements or (spherically curved) axial sliding bearings in which only an intermediate element is inserted from a material with the properties described above.

In order that the sliding bearing arrangement can also compensate or deflect the lateral acting forces, as may also be necessary within the framework of the present invention, the outer bearing ring has a spherically curved inner surface at least partially and the ring bearing interior a spherically curved outer surface at least partially, such that the shaft or shaft is pivotally mounted and movable axially and / or laterally. When the intermediate element described above is inserted, both axial length variations and lateral force actions are ideally compensated, while at the same time the sliding bearing arrangement according to the invention is protected from cold welding, and specifically under extreme conditions to which such components are subject, for example, in air or space navigation.

In another preferred embodiment of the present invention, the bearing element comprises an outer bearing ring with a spherically curved inner surface at least partially and the intermediate element forms an inner bearing ring that corresponds to the outer bearing ring with a spherically curved outer surface at least partially, for the housing of the shaft or shaft or of the reservoir tubing, axially movable and / or at the same time laterally. In this way, the intermediate element can be constructed, for example, of a spherically outwardly curved steel ring which is provided inside with the layer of the PTFE and fiber mixture embedded in sintered bronze described above. The decrease in construction related to this leads to a reduction in costs and additional weight.

Within the framework of the present invention the shaft or shaft is preferably hollow profiled. The slide bearing arrangement serves for the suspension of deposits for the reception, storage and delivery of gaseous, liquid and solid media. The shaft or shaft corresponds in this case to the reservoir pipes arranged on the side of the poles, in particular to the tank filling or tank emptying pipes that not only serve for the suspension of the tanks, but also for their filling with or outlet of media, in particular fuels.

The hollow profiled axis is therefore part of a reservoir which, according to the requirements in air or space navigation, is formed or structured or preferably constructed of titanium, aluminum or alloys thereof with each other and / or with other metals.

The invention finally relates to the use of a pressure vessel or vessel for the reception, storage and delivery of gaseous, liquid and solid media according to claims 11 to 13.

Other advantages and details of the invention result from the following description of preferred embodiments of the

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invention, as well as through the drawings. In this regard they show:

Figure 1 a schematic longitudinal sectional view partially truncated through a subject reservoir

in a support structure with a sliding bearing arrangement configured according to the invention,

Figure 2 a schematic longitudinal section view partially truncated by a first form

of realization of a slide bearing arrangement configured according to the invention according to figure 1 in the region of the free bearing, in enlarged representation, and

Figure 3 a schematic longitudinal section view partially truncated by a second form

of realization of a sliding bearing arrangement configured according to the invention corresponding to figure 2 in the region of the free bearing, in enlarged representation.

Figure 4a to 4d other exemplary embodiments only by way of example for pairing contact surfaces described with titanium or titanium alloys.

In the following description of embodiments of the pairing of cutting or contact surfaces according to the invention, in particular the arrangement of sliding bearings, the corresponding construction pieces, which correspond to each other, are provided in each case with numbers of identical reference. Although this description refers exclusively to satellite deposits of titanium alloys, it should not be limited thereto.

Figure 1 schematically shows a cylindrical tank 11, which is attached or suspended in a support structure 12 and is provided with reservoir tubing 15, 16 or similar axes, or if necessary, trees in each case arranged on the side of the poles Through the tank tubes 15, 16, which are shaped or molded in each case on the side of the poles along the central longitudinal axis 17 of the cylindrical tank 11 the tank 11 is mounted on the support structure 12. The reservoir 11 and reservoir tubing 15, 16 are formed from titanium or a titanium alloy.

The tank tubes 15, 16 serve at the same time for the filling and extraction of, for example, fuel and are shaped hollow profiles (not shown in this case). As shown in Figures 2 and 3, the reservoir tubing 16 is provided in this respect with a step 18.

Through a fixed bearing 13 and the reservoir tubing 15 the reservoir 11 is fixedly and rigidly connected with the support structure 12. Through a free bearing 14 and the reservoir tubing 16 the reservoir 11 is connected in a manner mobile with the support structure 12 or mobilely attached thereto. The direction of the free bearing 14 is, on the one hand, to compensate specifically for differences in axial longitudinal expansion according to arrow A caused by large temperature differences between reservoir 11 and support structure 12, and on the other hand vibration movements, that is to say forces that they act laterally according to arrow T between reservoir 11 and support structure 12, for example, in the case of launching a rocket.

According to FIG. 1, the free bearing 14 is formed by a bearing element 1 comprising an outer bearing ring 7 or outer ring and an inner bearing ring 8 or inner ring. Only the outer bearing ring 7 is fixedly connected to the support structure 12, while the inner bearing ring 8 is mounted thereon in a movable or secured manner. The inner bearing ring 8 is also not fixedly connected with the reservoir tubing 16, so that the reservoir tubing 16 is secured in the bearing inner ring 8 at least axially movable. The free bearing 14 is usually made of steel.

In order to avoid a cold welding of free bearing 14 of steel and reservoir tubing 16 of titanium or of an alloy thereof, a material is proposed that prevents any cold welding under the conditions that appear in air or space navigation, for example , at the launch of a satellite rocket. This material is, according to the invention, less hard than the titanium alloy used for tank construction. The material is preferably a mixture of Teflon and fibers embedded in sintered bronze, the sintered bronze being usually a tin and copper bronze and the fibers, glass or ceramic fibers being.

In figures 2 and 3 two preferred embodiments of a sliding bearing arrangement or sliding bearing matching according to the invention are shown.

The reservoir tubing 16 comprises a similar flange or flange that forms an axis 2 or shaft for housing the reservoir 11.

The free bearing 14 is configured as a bearing element 1 in the form of an axial sliding bearing, which is composed of an outer bearing ring 7 with an inner surface 9 spherically curved at least partially and an inner bearing ring 8 with a outer surface 10 spherically curved at least

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partially. Such axial sliding bearings serve to compensate forces acting axially and / or laterally.

In the first embodiment of the present invention, shown in Figure 2, the slide bearing arrangement has a two-part bearing element 1 (axial sliding bearing) common in the market, which is composed of a ring outer bearing 7 with spherically curved inner surface 9 and an inner bearing ring 8 with spherically curved outer surface 10. The outer bearing ring 7 and inner bearing ring 8 are usually made of steel, the inner bearing ring 8 being fitted in the form of a cap on the outer bearing ring 7.

Between the bearing element 1 and the shaft 2 or shaft of the reservoir tubing 16 an intermediate element 3 is inserted. The intermediate element 3 is formed from a material that prevents cold welding with the shaft 2 under the conditions that They appear in air or space navigation. The material in this case has a lower hardness than the titanium alloy used to manufacture the tank 1. It is preferably the sintered bronze already described in which a mixture of PTFE and fibers is embedded. The fibers are preferably glass fibers or ceramic fibers. The mixture of PTFE and fibers prevents an exit of ions from the sintered bronze. A thin layer of Teflon or ceramic can be additionally provided on this layer of material to further prevent ion leakage.

The intermediate element 3 is configured completely or at least partially from a mixture of Teflon and fibers embedded in sintered bronze.

The intermediate element 3 in the embodiment of Figure 2 is configured as bushing 4 or sleeve. The bushing 4 is inserted under pressure in the bearing element 1. For this, the bearing element 1 can be terminated if necessary to adapt its internal diameter to the external diameter of the bushing 4. The methodology for this is known in principle in the state of the technique and therefore is not explained in this case in detail.

The bushing 4 used as an intermediate element 3 according to the embodiment of Figure 2 is constructed together from sintered bronze and the mixture of PTFE and fibers embedded therein.

Alternatively, it is also possible to configure the intermediate element 3 in the form of a bushing 4 or sleeve with a metal shell, preferably steel. The shell of the bushing 4 is designed or coated / coated then on or on the surface 5 of the bushing 4, which is directed to the axis 2 or is in contact with it, with a layer of the material described above.

Instead of a bushing 4 as intermediate element 3 - regardless of whether it is formed completely or at least partially from sintered bronze and the mixture of Teflon and fibers embedded therein - intermediate element 3, without being represented in detail, likewise it can be installed directly on or on the surface 6 of the inner bearing ring 8, which is directed to the shaft 2 or shaft or is in contact with it in the form of a layer of the material described above. The layer is in other words placed directly on or on the surface 6 of the inner bearing ring 8 directed to the axis 2. The intermediate element 3 therefore represents a part of the bearing element 1 itself.

In the second embodiment of the present invention, which is represented in Figure 3, a sliding bearing arrangement is proposed in which the intermediate element 3 is also configured as part of the bearing element 1. In this case the bearing 1 comprises an outer bearing ring 7 with an inner surface 9 at least partially spherical in shape. The inner bearing ring 8 in the form of a cap with an outer surface 10 at least partially spherical in shape, which corresponds to the outer bearing ring 7 in the exemplary embodiment has been completely replaced by an intermediate element 3 of sintered bronze of the same configuration in which the mixture of PTFE and fibers is embedded. In other words, according to the invention, an axial sliding bearing or free bearing 14 is provided having an outer bearing ring 7 with an inner surface 9 of steel or similar spherically curved material. In this outer bearing ring 7 as an inner bearing ring 8 an intermediate element 3 of which at least the surface 6 directed to the axis 2 is formed or mounted is formed from a material that prevents a cold welding with the axis 2 low the conditions that appear in air navigation or space. This material has a hardness less than the axis 2 of titanium alloy. It is preferably sintered bronze in which it is embedded, a mixture of PTFE and fibers as described above.

For this, it is again possible to use the intermediate element 3 in sintered bronze assembly, in which it is embedded, a mixture of PTFE and fibers as described above. This slide bearing arrangement is an equally preferred object of the invention since it is therefore possible to adapt optimally to the predetermined dimensions of the axis 2 of a reservoir tubing 16.

With each of the two embodiments, in any case an optimal adaptation of the material is provided

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The arrangement of sliding bearings to an element to be accommodated from a titanium alloy. The pairing of sintered bronze with a mixture of PTFE and fibers embedded in it with the titanium alloy not only meets the requirements valid for applications in air or space navigation, specifically through 11,000 test cycles a 1 kN lateral load as well as an amplitude of oscillations of +/- 7 mm at a frequency of 40 Hz, without a cold weld. Even 1.5 kN are performed through 200,000 cycles.

The arrangement of sliding bearings according to the invention is therefore predestined for the accommodation and support of different components for air or space navigation, but is not limited in particular to satellite tanks.

The arrangement of sliding bearings according to the invention is suitable for receiving and accommodating tanks, in particular of pressure vessels, tanks or high pressure tank high pressure tank, for the reception, storage and delivery of gaseous, liquid and liquid media. solids, in particular cryogenic fluids, preferably of oxygen and hydrogen t, in vehicles, in particular in air vehicles or aircraft in air or space navigation, preferably in airplanes and space vehicles, in particular in vessels, preferably in a submarine or hovercraft ( hovercraft), or in particular in land vehicles, preferably in a car, truck or motorhomes.

The arrangement of sliding bearings according to the invention is suitable for receiving and accommodating tanks, in particular of pressure vessels, tanks or high pressure tank for the reception, storage and delivery of gaseous, liquid and solid media, in air vehicles or aircraft in air or space navigation, preferably in airplanes and space vehicles, rockets and / or satellites, or in especially pure or clean environments, in particular in a vacuum or in a clean room.

The arrangement of sliding bearings according to the invention is altogether also suitable for the accommodation of the most diverse components in technical procedure installations of any type since it has a long service life due to low wear.

In figures 4a to 4e as mentioned, examples of application are shown schematically only for the pairing of cutting or contact surfaces according to the invention with titanium or titanium alloys.

Figure 4a shows in them the arrangement of shaft stumps 20, 20 'arranged so that they can move towards each other. The shaft stumps 20, 20 'are configured from titanium or a titanium alloy as defined above and are connected to each other through a bolt 21 such that they can pivot towards each other. This requires a rotation movement, although also limited, which could lead to precipitous wear between shaft and bolt stumps. The construction pieces are seized.

To avoid this problem, a bushing 22 can be provided that crosses the shaft dies 20, 20 '. The bushing 22 is located between the internal wall of the perforation provided in the shaft dies 20, 20 'and the bolt 21 arranged for the connection and pivoting. The bushing 22 is made of sintered bronze with a mixture of PTFE and fibers embedded in it as defined above, thus preventing premature wear and seizing of the cutting and contact surface between titanium / titanium alloy and bolt 21, which for example is made of stainless steel. The bushing 22 may be made entirely of sintered bronze with a mixture of PTFE and fibers embedded therein as defined above or be coated, at least its outer side.

Another example of application is a tightening joint shown in Figure 4b. In a construction piece 23 of titanium or a titanium alloy as defined, a bolt 24, for example of stainless steel, is screwed with a screw 25. The bolt 24 is housed in a sintered bronze bushing 22 with a mixture of PTFE and fibers embedded therein as defined above. Therefore, contact corrosion and therefore wear can be prevented. Furthermore, the bolt 24 wrapped with the sintered bronze bushing 22 with the mixture of PTFE and fibers embedded therein can be adapted in size to the recess provided in the construction piece 23 for its housing since the bushing 22 is made of a softer material and therefore can yield to an eventual tightening pressure without deforming the construction piece 23 in this case.

In figures 4c and 4d two embodiments of screw connections are shown in which the principle according to the invention of pairing cutting or contact surfaces has been carried out.

According to Fig. 4c, a conventional screw 26 is introduced into a construction piece 28 of titanium, aluminum or alloys thereof with each other or with other metals. The screw 26 has an external thread 27 not shown in this case. The external thread 27 is configured on the conventional sintered bronze screw with the mixture of PTFE and fibers embedded and defined above.

Within the framework of the present invention there is also a screw, whose thread is constructed or made of

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sintered bronze with the mixture of PTFE and embedded fibers. Such thyme can therefore be used in the field of air or space navigation, but also in general mechanical engineering when construction pieces of titanium, aluminum or alloys thereof are always used with each other or with other metals. The risk of damage to the titanium material by means of the screw thread is significantly reduced due to the sintered bronze coating with a mixture of PTFE and fibers embedded in it for the indicated reasons.

Another very simple screw connection is shown in Figure 4d. Two elements of construction piece 30 for example in the form of a titanium, aluminum plate or alloys thereof with each other or with other metals are joined by a screw 29 and a nut 32. The screw 29 and nut 32 can be made of conventional material , for example, steel. To prevent corrosion by contact, wear and / or seizure, sintered bronze bushing 33 is introduced with the PTFE and fiber mixture embedded and defined above in the recesses provided in the construction piece elements 30 for joining. Sintered bronze washers 31 are inserted in the screw and nut head support places 32 with the PTFE and fiber mixture embedded and defined above so that the screw 29 and the nut 32 do not come into direct contact with the workpiece element constructive 30 of titanium, aluminum or alloys thereof with each other or with other metals. Therefore, premature wear, contact corrosion and seizure are avoided again. At the same time the operation or mode of construction is essentially simplified so that no special instructions or even training of personnel or users are required.

Another possible application case is finally shown in Figure 4e. In the area of air or space navigation, large differences in temperature may appear, particularly among constructional elements located one above the other, but in use up to a certain extent they must remain mobile towards each other. the others. In Fig. 4e two such building element elements 34 and 35 are shown schematically, for example, in the form of a plate. These construction piece elements can both be made of titanium, aluminum or alloys thereof with each other or with other metals or of these materials and other metallic or ceramic material. To improve the sliding capacity of each other in this case, a sintered bronze plate 36 is provided with the mixture of PTFE and fibers embedded and defined above.

The present invention should not be limited to the embodiments and application cases described in this case. Rather, the general idea of the facilitation of a complementary cutting or contact piece for elements of a titanium, aluminum or alloy construction piece is applied to each other or to other metals, being made or at least partially equipped with it. Complementary contact piece, designed in any way of construction, of a softer material in comparison, preferably of sintered bronze with the mixture of PTFE and fibers embedded and defined above.

Claims (13)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 1. Tank or pressure vessel, in particular high pressure tank, for the reception, storage and delivery of gaseous, liquid and solid media, in particular cryogenic fluids, preferably of oxygen and hydrogen, and with a suspension arrangement for the housing of the reservoir or pressure vessel on / in a support structure (12), which comprises a fixed bearing (13) and a free bearing (14), characterized by a shaft (2) or shaft made of titanium, aluminum or an alloy of the same, which is supported through the fixed bearing (13) and the free bearing (14) of the support structure (12), the free bearing (14) being formed from an arrangement of sliding bearings (1) of steel or stainless steel comprising an outer bearing ring (7) and an inner bearing ring (8), and an intermediate element (between the arrangement of sliding bearings (1) and the shaft (2) being arranged between the shaft) 3) or an intermediate layer , which is configured completely or at least partially of a mixture of fibers and PTFE embedded in sintered bronze and has a hardness less than the shaft (2) or tree of titanium, aluminum or an alloy thereof to avoid a cold welding of the surface of the slide bearing arrangement (1) associated with the shaft (3) or shaft with the shaft (3) or shaft under the conditions that appear in air or space navigation. 2. A container according to claim 1, characterized in that the sintered bronze of the intermediate element (3) is a tin and copper bronze. 3. A container according to claim 1 or 2, characterized in that the fibers of the fiber and PTFE mixture of the intermediate element (3) are glass or ceramic fibers. 4. Container according to one of claims 1 to 3, characterized in that the intermediate element (3) comprises glass or ceramic fibers. 5. Container according to one of claims 1 to 4, characterized in that the intermediate element (3) is configured as a bushing (4) or sleeve. A container according to one of claims 1 to 5, characterized in that the intermediate element (3) is placed as a layer on a surface (6; 5) of the sliding bearing arrangement (1) or of the sleeve (4) or sleeve directed to the axis (2) or tree. A container according to one of claims 1 to 6, characterized in that the outer bearing ring (7) has an inner surface (9) spherically curved at least partially and the inner bearing ring (8) an outer surface (10) curved spherically at least partially, such that the shaft (2) or shaft is movably mounted axially and / or laterally. A container according to one of claims 1 to 6, characterized in that the bearing element (1) comprises an outer bearing ring (7) with an inner surface (9) spherically curved at least partially and the intermediate element (3) forms an inner bearing ring (8) corresponding to the outer bearing ring (7) with an outer surface (10) spherically curved at least partially, such that the shaft (2) or shaft is axially movably mounted and / or laterally. 9. Container according to one of claims 1 to 8, characterized in that the shaft (2) or profiled shaft is hollow. A container according to claim 9, characterized in that the hollow profiled shaft (2) is part of the container (11), in particular of the reservoir filling and reservoir emptying tubing. 11. Use of a container, in particular of a pressure vessel, reservoir or reservoir at high pressure, for the reception, storage and delivery of gaseous, liquid and solid media, in particular cryogenic fluids, preferably of oxygen and hydrogen, according to a of the preceding claims in connection with so-called satellite deposits for air or space navigation. 12. Use of a container, in particular of a pressure vessel, reservoir or reservoir at high pressure, for the reception, storage and delivery of gaseous, liquid and solid media, in particular cryogenic fluids, preferably of oxygen and hydrogen, according to a of the preceding claims in vehicles, in particular in air vehicles or aircraft in air or space navigation, preferably in airplanes and space vehicles, in particular in vessels, preferably in a submarine or hovercraft, or in particular in land vehicles, preferably in a car, truck or motorhome. 13. Use of a container, in particular of a pressure vessel, tanks or high pressure tank for the reception, storage and delivery of gaseous, liquid and solid media, according to one of the preceding claims in air vehicles or aircraft in navigation air or space, preferably in airplanes and space vehicles, rockets and / or satellites, or in especially pure or clean environments, particularly in a vacuum or in a clean room.